<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>E-WhiteBoard Client</title>
    <style>
        /* design-surface */

        .design-surface {
            background-color: white;
        }

        .design-surface canvas {
            position: absolute;
        }

        .design-surface canvas:last-child {
            position: static;
        }
    </style>
</head>
<body>
<div class="design-surface">
    <canvas id="temp-canvas" style="border: 1px solid black"></canvas>
    <canvas id="main-canvas" style="border: 1px solid red"></canvas>
</div>
<script src="jquery-3.2.1.js"></script>
<script src='client.js'></script>
</body>
</html>